246 lines
7.8 KiB
C
246 lines
7.8 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is libguac-client-ssh.
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*
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* The Initial Developer of the Original Code is
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* Michael Jumper.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* James Muehlner <dagger10k@users.sourceforge.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <stdlib.h>
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#include <string.h>
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#include <libssh/libssh.h>
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#include <guacamole/socket.h>
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#include <guacamole/protocol.h>
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#include <guacamole/client.h>
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#include "ssh_client.h"
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#include "ssh_handlers.h"
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#include "ssh_terminal.h"
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/* Client plugin arguments */
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const char* GUAC_CLIENT_ARGS[] = {
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"hostname",
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"user",
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"password",
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NULL
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};
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int ssh_guac_client_password_key_handler(guac_client* client, int keysym, int pressed) {
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ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
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/* If key pressed */
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if (pressed) {
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/* If simple ASCII key */
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if (keysym >= 0x00 && keysym <= 0xFF) {
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/* Add to password */
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client_data->password[client_data->password_length++] = keysym;
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ssh_guac_terminal_write(client_data->term, "*", 1);
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ssh_guac_terminal_redraw_cursor(client_data->term);
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guac_socket_flush(client->socket);
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}
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else if (keysym == 0xFF08) {
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if (client_data->password_length > 0) {
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client_data->password_length--;
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/* Backspace */
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ssh_guac_terminal_write(client_data->term, "\x08\x1B[K", 4);
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ssh_guac_terminal_redraw_cursor(client_data->term);
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guac_socket_flush(client->socket);
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}
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}
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else if (keysym == 0xFF0D) {
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/* Finish password */
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client_data->password[client_data->password_length] = '\0';
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/* Clear screen */
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ssh_guac_terminal_write(client_data->term, "\x1B[2J\x1B[1;1H", 10);
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ssh_guac_terminal_redraw_cursor(client_data->term);
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guac_socket_flush(client->socket);
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return ssh_guac_client_auth(client, client_data->password);
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}
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}
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return 0;
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}
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int guac_client_init(guac_client* client, int argc, char** argv) {
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guac_socket* socket = client->socket;
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ssh_guac_client_data* client_data = malloc(sizeof(ssh_guac_client_data));
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ssh_guac_terminal* term = ssh_guac_terminal_create(client);
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/* Init client data */
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client->data = client_data;
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client_data->term = term;
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client_data->mod_ctrl = 0;
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client_data->clipboard_data = NULL;
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/* Send name and dimensions */
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guac_protocol_send_name(socket, "SSH TEST");
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guac_protocol_send_size(socket,
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GUAC_DEFAULT_LAYER,
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term->char_width * term->term_width,
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term->char_height * term->term_height);
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/* Cursor layer need only be one char */
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guac_protocol_send_size(socket, term->cursor_layer, term->char_width, term->char_height);
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/* Draw cursor */
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guac_protocol_send_rect(socket, term->cursor_layer,
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0, 0, term->char_width, term->char_height);
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guac_protocol_send_cfill(socket,
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GUAC_COMP_OVER, term->cursor_layer,
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0x40, 0xFF, 0x80, 0x80);
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guac_socket_flush(socket);
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/* Open SSH session */
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client_data->session = ssh_new();
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if (client_data->session == NULL) {
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guac_protocol_send_error(socket, "Unable to create SSH session.");
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guac_socket_flush(socket);
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return 1;
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}
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/* Set session options */
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ssh_options_set(client_data->session, SSH_OPTIONS_HOST, argv[0]);
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ssh_options_set(client_data->session, SSH_OPTIONS_USER, argv[1]);
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/* Connect */
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if (ssh_connect(client_data->session) != SSH_OK) {
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guac_protocol_send_error(socket, "Unable to connect via SSH.");
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guac_socket_flush(socket);
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return 1;
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}
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/* If password provided, authenticate now */
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if (argv[2][0] != '\0')
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return ssh_guac_client_auth(client, argv[2]);
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/* Otherwise, prompt for password */
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else {
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client_data->password_length = 0;
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ssh_guac_terminal_write(client_data->term, "Password: ", 10);
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ssh_guac_terminal_redraw_cursor(client_data->term);
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guac_socket_flush(client->socket);
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client->key_handler = ssh_guac_client_password_key_handler;
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}
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/* Success */
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return 0;
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}
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int ssh_guac_client_auth(guac_client* client, const char* password) {
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guac_socket* socket = client->socket;
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ssh_guac_client_data* client_data = (ssh_guac_client_data*) client->data;
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ssh_guac_terminal* term = client_data->term;
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/* Authenticate */
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if (ssh_userauth_password(client_data->session, NULL, password) != SSH_AUTH_SUCCESS) {
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guac_protocol_send_error(socket, "SSH auth failed.");
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guac_socket_flush(socket);
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return 1;
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}
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/* Open channel for terminal */
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client_data->term_channel = channel_new(client_data->session);
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if (client_data->term_channel == NULL) {
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guac_protocol_send_error(socket, "Unable to open channel.");
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guac_socket_flush(socket);
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return 1;
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}
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/* Open session for channel */
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if (channel_open_session(client_data->term_channel) != SSH_OK) {
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guac_protocol_send_error(socket, "Unable to open channel session.");
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guac_socket_flush(socket);
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return 1;
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}
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/* Request PTY */
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if (channel_request_pty(client_data->term_channel) != SSH_OK) {
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guac_protocol_send_error(socket, "Unable to allocate PTY for channel.");
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guac_socket_flush(socket);
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return 1;
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}
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/* Request PTY size */
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if (channel_change_pty_size(client_data->term_channel, term->term_width, term->term_height) != SSH_OK) {
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guac_protocol_send_error(socket, "Unable to change PTY size.");
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guac_socket_flush(socket);
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return 1;
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}
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/* Request shell */
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if (channel_request_shell(client_data->term_channel) != SSH_OK) {
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guac_protocol_send_error(socket, "Unable to associate shell with PTY.");
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guac_socket_flush(socket);
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return 1;
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}
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guac_client_log_info(client, "SSH connection successful.");
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/* Set handlers */
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client->handle_messages = ssh_guac_client_handle_messages;
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client->free_handler = ssh_guac_client_free_handler;
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client->mouse_handler = ssh_guac_client_mouse_handler;
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client->key_handler = ssh_guac_client_key_handler;
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client->clipboard_handler = ssh_guac_client_clipboard_handler;
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/* Success */
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return 0;
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}
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